Why Choose Aluminum Oxide Blasting Media?

When it comes to abrasive blasting applications, aluminum oxide is one of the most versatile and effective blasting medias available. Aluminum oxide, also known as corundum, comes in a wide range of grit sizes ranging from extra coarse to microfine. The most commonly used aluminum oxide grits are 100 and 120, making them ideal for a variety of machining and finishing jobs. There are many reasons why 100 and 120 grit aluminum oxide makes an excellent abrasive blasting media choice.

First and foremost, aluminum oxide is extremely hard and durable. On the Mohs hardness scale, it ranks 9 out of 10, just under diamond. This extreme hardness allows aluminum oxide grit to cut through tough coatings, rust, mill scale and other surface contaminants. At the same time, it resists fracturing and breaking down during blasting. This durability means aluminum oxide media maintains its cutting power longer than other softer abrasives, resulting in greater efficiency and productivity.

Another major benefit of aluminum oxide is its density. With a specific gravity of 3.5 to 4.0, it is considerably denser than many competing abrasives. This higher density gives aluminum oxide superior velocity and impact energy as compared to lighter materials like plastic, glass bead or organic media. The added kinetic energy enables faster cleaning rates and improved surface profiling. Dense medias like aluminum oxide also recycle better through blast equipment.

When working with harder metals like stainless steel, titanium and nickel alloys, 100 or 120 grit aluminum oxide really shines. The sharp edges of aluminum oxide grip and cut into these materials much better than softer, more rounded abrasives. This makes aluminum oxide an excellent choice for weld preparation, surface improvement and coating removal on alloy steels. It can also profile a smooth “anchor pattern” that paint and other coatings adhere to tenaciously.

Aluminum oxide grit is specially engineered to achieve consistent particle sizes and shapes for predictable blasting results. The crushed grains undergo screening and classification to meet exact standards for size and distribution. This uniformity results in precision surface finishes, etch patterns and cut rates. Other abrasives with more variability in size and shape make it harder to control surface profiles.

When blasting aluminum, magnesium or other soft, delicate materials, aluminum oxide’s durability helps minimize embedding. Media breakdown and embedding can be issues with softer, less durable abrasives. The sharp cutting edges of aluminum oxide cut cleanly without excessive gouging, even on sensitive alloys. This gives better control over surface finish on easily marred metals.

With its melting point over 2000°C, aluminum oxide can handle high temperature applications that would cause other media to degrade. It maintains its integrity when blasting heat affected zones, annealed materials and alloys prone to work-hardening. Exposure to moderate heat also helps keep aluminum oxide free of moisture, oils or other contaminants.

While durable, aluminum oxide is also considered a more eco-friendly blasting abrasive. It is not susceptible to leaching hazardous substances when disposed of. Waste aluminum oxide media can also be recycled and reprocessed rather than landfilled. When paired with a dust collector, it allows for a cleaner working environment than other messier abrasives.

Blast cabinets and portable blast pots are commonly used to deliver 100 or 120 grit aluminum oxide media. This equipment contains the media and debris while allowing the operator to precisely direct the blasting nozzle. Self-contained blast machines provide efficient on-site blasting capabilities with minimal cleanup.

With the right feeding and recovery equipment, aluminum oxide can also be used for automated blasting in blast rooms and mass finishing systems. Conveyorized blast machines allow continuous throughput of parts for high production rates. Vibratory tumblers provide economical finishing of smaller components.

For industrial users who go through a lot of abrasive media, aluminum oxide offers cost efficiencies compared to other medias. Its hardness and durability translate to low per-part costs over the lifetime of the media. Less media breakage also means reduced makeup requirements and waste. Even with higher upfront costs, total blasting costs are kept under control.

Overall, 100 and 120 grit aluminum oxides offer user-friendly qualities that make blasting tasks easier. It flows well through blast equipment and recycles efficiently. Low-dusting formulations keep visibility high and minimize breathing hazards inside blast cabinets. The high kinetic energy provides fast cleaning rates to maximize productivity.

Finding a local distributor or media supplier that stocks aluminum oxide is typically easy. With its widespread use across many industries, most abrasive suppliers offer 100 and 120 grit aluminum oxide along with other mesh sizes. Some also blend aluminum oxide with finer abrasives to create specialty mixed media products. Whether purchasing by the bag or truckload, aluminum oxide can generally be sourced conveniently.

For industrial-grade cutting, profiling and finishing of metals, it’s hard to beat the performance of 100 or 120 grit aluminum oxide blasting media. This versatile abrasive tackles a wide array of metal processing applications with ease. With the right blast equipment and media recovery systems, aluminum oxide provides economical surface preparation and finishing for shops of all sizes. Contact a supplier of aluminum oxide media to learn more about incorporating it into your process.

5 Key Benefits of Using 100 & 120 Grit Al Oxide

When it comes to abrasive blast media, aluminum oxide in 100 and 120 grit sizes offers users some outstanding advantages. While there are many good abrasive options, aluminum oxide combines several beneficial properties that make it ideal for a wide range of applications. Here are 5 key benefits provided by 100 and 120 grit aluminum oxide blast media.

First, aluminum oxide has tremendous durability and hardness for its ability to cut. With a Mohs hardness of 9, it is one of the hardest abrasive blasting media available. This extreme hardness allows aluminum oxide to rapidly profile the surface of even very hard metals like stainless steel and titanium. Yet unlike other hard abrasives like silicon carbide, aluminum oxide resists fracturing. This gives the media excellent longevity and productivity.

Another advantage of aluminum oxide is its density. Weighing nearly 4 grams per cc, it is significantly heavier than other blast media like plastic, glass or organic materials. This higher density transfers more kinetic energy to the workpiece on impact. The result is faster cut rates and productivity compared to lighter abrasives with less momentum.

The angular shape and sharp edges of aluminum oxide also provide performance benefits. The crushed grains grip and cut more aggressively than rounded media like plastic beads or fine glass powder. This characteristic allows aluminum oxide to bite into tough rust, mill scale, coatings and other surface contaminants that can be difficult to remove.

When blasting delicate materials like aluminum or magnesium, aluminum oxide’s durability helps minimize surface damage. While removing coatings and corrosion, the media maintains its shape rather than breaking down into fine particles that can embed. This gives better control over surface finish on soft alloys.

The uniformity and consistency of today’s aluminum oxide media is another advantage. Precision screening, grading and quality control result in media that is properly sized for consistent surface profiles. The grains are also free of hazardous impurities that could contaminate sensitive applications.

Aluminum oxide works well across a wide temperature range from cryogenics to over 2000°F. It maintains its integrity and cutting ability without degradation. This makes aluminum oxide suitable for specialized processes where heat is involved. It also avoids moisture absorption issues of some media.

Modern low-dusting aluminum oxide formulations keep visibility high when blasting in cabinets. The dustless media prevents powder clouds that obstruct views of the workpiece. Breathing is also easier compared to dusty media that requires frequent mask cleaning.

When used with proper blast equipment, aluminum oxide provides a high degree of control over surface finishes, etch patterns and cut depth. Media flow can be regulated to achieve precise results. Automated blasting systems allow excellent repeatability once dialed in.

The reusable nature of aluminum oxide makes it very economical for production use. Minimal fracture rates and degradation translate to low media consumption. Less media usage also reduces cleanup and disposal costs. With fewer change-outs, blasting productivity goes up.

Being inert and non-toxic, spent aluminum oxide does not create hazardous waste issues. It can be recycled and reused rather than disposed of in landfills. This makes aluminum oxide more environmentally friendly than some alternate media that contain heavy metals or contaminants.

With so many benefits and capabilities, it’s easy to see why 100 and 120 grit aluminum oxide is a first choice for abrasive blasting pros. It rapidly cleans and profiles even the toughest metal surfaces. At the same time, it allows control over surface finishes on delicate materials. Combine this with efficiency, economy and low environmental impact, and aluminum oxide media clearly outpaces other blasting abrasives.

Aluminum oxide in 100 grit and 120 grit sizes works with most standard blast equipment. Both mesh sizes provide a nice balance of cut rate and surface finish refinement. Finer meshes produce smoother surface texture while coarser sizes offer more aggressive material removal. Consider how each size meets the needs of specific blasting projects.

To take advantage of aluminum oxide for your own abrasive blasting needs, contact a qualified media supplier. With different package sizes from bags to bulk truckloads, obtaining 100 or 120 grit aluminum oxide is convenient. A knowledgeable distributor can also advise on blast equipment selection and help maximize the benefits of aluminum oxide media in your process.

Top Places to Buy Aluminum Oxide Abrasives Near Me

For shops and plants that rely on aluminum oxide abrasives for blasting, grinding or cutting applications, having a local source for media is essential. Eliminating long lead times and high shipping costs provides major advantages. Fortunately, most areas have suppliers conveniently located nearby to meet aluminum oxide needs.

Industrial distributors are the first places to check for readily available aluminum oxide. With warehouses nationwide, major suppliers like Airgas, Air Products, Fastenal, Grainger and McMaster-Carr stock common aluminum oxide grits. Walk into their local branch and buy what you need off the shelf. Larger quantity discounts may require a day or two for delivery.

Local welding supply stores also frequently carry bags and buckets of popular blasting abrasives like 100 grit and 120 grit aluminum oxide. Stores that cater to metal fabrication and finishing trades are great resources. Be sure to ask if they can order larger volumes at a discounted bulk rate.

For smaller quantities, traditional hardware stores and home centers may carry aluminum oxide. Check stores like Ace Hardware, True Value and Do it Best for abrasive blasting supplies. just look in the section with sandpaper, grinding wheels and sharpening stones. The selection is often limited but convenient.

Specialized media and abrasive suppliers are excellent sources for aluminum oxide in all mesh sizes. They offer expertise in selecting the right grits and quantities for different applications. Large metro areas often have distributors with warehouse stock for immediate pickup or fast local delivery.

Local automotive parts stores can be an option for small aluminum oxide packages tailored for auto refinishing. Look for abrasives marketed for paint stripping or surface prep prior to painting. Just verify the grit size for suitability to industrial uses.

For very large or frequent media purchases, going through an industrial mill supply company may provide the best value. Their distribution networks and purchasing power often result in lower commodity pricing. Freight costs are reduced by sourcing through their local branch.

Searching online for “abrasive media near me” yields suppliers in most regions. Look for well-established distributors knowledgeable about technical applications. They can advise on the best media characteristics for particular jobs.

Regional quarries and mineral processors that source and crush aluminum oxide are direct options in some areas. Purchasing closer to the manufacturing source may cut costs. Just ensure the material quality and sizing meets your needs.

Local abrasive recycling companies are another potential source of quality blast media. Reprocessed aluminum oxide screened to consistent specifications can offer big savings compared to virgin material. Availability varies by location.

Checking industrial listings, business directories and regional associations provides additional leads on nearby distributors. Sites like Google Maps and Yellow Pages display suppliers based on location. Search both distributors and abrasive manufacturers.

Don’t overlook large local machine shops, foundries and metalworking plants as possible sources. Many reclaim spent aluminum oxide from their own operations for reuse. They often sell excess media at discount prices.

flea markets can actually be surprisingly good places to find used bags of new aluminum oxide at bargain prices. Look in vendor stalls with tools and workshop items. The abrasive may be unlabeled but still functional.

For small needs, local automotive detailing and collision shops may sell new or used aluminum oxide media intended for paint prep or auto body work. The quantities are limited but the convenience may outweigh that.

Checking with nearby universities and vocational schools can uncover inexpensive abrasives used by their materials engineering or welding programs. Many will sell off surplus supplies.

With abrasives as common as aluminum oxide, keeping local sources stocked is easy for distributors. Taking advantage of these nearby suppliers saves significant time and money compared to buying sight unseen. For the best value and service, search out reputable local distributors that welcome small purchases as well as bulk orders.

Grading Aluminum Oxide Grit – Which Is Best?

Aluminum oxide blasting abrasives are available in a wide range of grit sizes from extra coarse to microfine. With so many mesh and grade options, choosing the right one for an application can be confusing. Understanding aluminum oxide grading scales and matching grit to your goals is key.

Mesh size is the principal factor used to grade aluminum oxide grits. Higher mesh numbers indicate smaller particle sizes, while lower mesh numbers represent coarser abrasive grains. Common meshes include 16, 24, 36, 46, 60, 80 and 120. Finer sizes up to 1200 mesh are produced.

As an example, 50 mesh aluminum oxide contains particles that pass through a 50 mesh sieve. This correlates to particle sizes ranging from about 300 to 600 microns. A 120 mesh abrasive passes through a 120 mesh screen, meaning grains are 105 to 177 microns in diameter.

Knowing the mesh size immediately provides a sense of the abrasive’s cutting ability. Coarser grits are more aggressive for bulk material removal, while finer ones produce smoother, more refined surface finishes.

Another factor in grading is hardness, which relates to the mineral content. Higher purity aluminum oxide is harder and more durable than lower grades. Hardness is denoted by letter grades from A to F. Grade A is the purest with a Mohs hardness of 9, while F contains more impurities and is slightly softer.

In addition to mesh and hardness ratings, other properties help match aluminum oxide to applications. Density, grain shape and friability – the tendency to fracture – all impact performance. Standards help classify these properties consistently.

So how do shops choose the optimal mesh size? Consider what combination of stock removal rate and final surface finish is needed. Coarser grits like 16, 24 and 36 mesh aggressively cut materials but leave rougher finishes. Finer 80 mesh or 120 mesh produce smoother textures.

Heavy rust and thick coatings require more cutting power. A 36 or 46 mesh aluminum oxide quickly removes corrosion and old paint or powder coatings. Finishing processes need smoother 80 or 120 grit.

Harder metals like tool steel and nickel alloys are best abraded with coarse 24 mesh for efficient profiling. Soft alloys like aluminum only require gentle finishing with 120 mesh or higher.

Critical applications where surface damage is unacceptable may need 180 mesh or 220 mesh for microfinishing. However, productivity suffers with such fine grit. Consider multi-step processes using coarse then fine grits.

The condition, hardness and brittleness of the substrate material also influences ideal grit. Fragile materials demand less aggressive media to prevent fracturing the surface.

Porosity and desired anchor pattern profile determine mesh selection. Coarse grit leaves deeper peaks and valleys for paint adhesion. Fine grit produces a smoother surface.

Method of use and equipment capabilities matter too. Different blast systems have optimal mesh ranges for media velocity and airflow. Consider nozzle orifice size, pressure capacity and impact velocity.

Cost differences between grits can be a factor. Smoother media is typically more expensive to produce. Will the benefits of finer abrasive offset higher prices?

Environmental concerns may dictate finer grades to reduce dust and debris. However, ultra-fine grit costs more and cuts slower. Select an acceptable compromise.

For most versatile use, 100 mesh and 120 mesh aluminum oxide splits the difference nicely. The medium grit removes rust and coatings efficiently while finishing to a reasonable smoothness. Mesh sizes in the 46 to 80 range are also useful for broadly adapted performance.

Rather than just one mesh, a blend of grits can optimize cutting and finishing. Starting with coarse grit then refining with finer media combines benefits. Or use coated grits that integrate fine and coarse particles.

Test samples on scrap materials provide the best real-world evaluation. Assess cut rates, surface finish and other needs. Minor mesh adjustments can be made from testing feedback.

Consider stocking a selection of different aluminum oxide grits to handle various tasks. Abrasive suppliers can recommend complementary mesh sizes tailored to particular applications.

Understanding aluminum oxide grading guides appropriate media selection. With the wrong grit size, results suffer. Matching mesh and hardness to the capabilities needed prevents disappointments. Discuss specific process requirements with media experts to dial in the perfect aluminum oxide abrasive.

Black, Brown, Pink, White – Al Oxide Color Explained

Aluminum oxide blasting media comes in a range of colors including black, brown, pink, white, and even blue and green. This is contrary to alumina’s typical white crystalline appearance in its raw mineral form. The abrasive’s color results from impurities, additives and manufacturing methods that enhance properties.

By far the most common aluminum oxide color is black. Black abrasive media utilizes fused aluminum oxide made by smelting purified alumina with coke and iron filings. Trace elements from these additives lend a dark color. The fusion process creates durable, high-density grit.

Black aluminum oxide is ideal for removing heavy coatings like rust or paint from steel. It offers fast cutting action along with low dust and low free silica. The dark color contrasts well against workpieces for enhanced visibility in the blast cabinet.

Brown-colored aluminum oxide contains titanium dioxide added during fusion, resulting in a reddish-brown hue. A small amount of this additive helps inhibit fracturing, improving durability over standard black material. The benefit is longer life and lower media consumption.

Pink or rose-colored media utilizes a chromium oxide additive for increased toughness and heat resistance. Trace amounts of chromium oxide prevent grain fracture even under extreme high-temp blasting. Pink aluminum oxide is specified for removing scale from hot-worked metals or heat affected weld zones.

Unfused white aluminum oxide is produced directly from the alumina mineral by crushing and screening. It contains few impurities so retains the clear white color. Being unfused, white AO is sharper and more friable than black, making it ideal for lightweight finishing applications.

White AO works well on softer metals like aluminum where fracturing helps prevent surface gouging. It generates low dust levels for clean operation. White aluminum oxide is also used for polishing and lapping applications requiring precise particle control.

Blue aluminum oxide obtains its distinctive color from trace amounts of cobalt metal added during fusion. The cobalt improves grain adhesion while enhancing heat and oxidation resistance at high temperatures. This makes blue AO well-suited for extreme environment blasting.

Emerald green aluminum oxide takes its verdant color from trace chromium oxide, silica and magnesium additions. The chromium aids corrosion resistance while the other elements improve friability. Green AO is another option for high heat and chemical applications.

In terms of cutting performance, black aluminum oxide is the most aggressive due to its high density and sharp, durable grains. White AO is the least aggressive with its friable unfused grains that quickly round over. Colored variants like blue and pink offer properties between these extremes.

For economic general purpose blasting, black aluminum oxide is the goto choice. The fused black grits offer a near-ideal balance of cutting power, durability and recyclability. Black AO removes rust, paint and scales from most metals quickly and efficiently at low cost.

Select white AO when working with soft metals where fracturing grains help prevent surface gouging. The sharp particles also excel at finishing work where smoothness is critical. White aluminum oxide is unsuited to heavy coating removal.

Pink and blue aluminum oxides are specified primarily for their enhanced properties at high temperatures. Choose pink for hot steel blasting and blue for extreme chemical or environmental conditions. Costs are higher than black or white media.

While color provides some indication of aluminum oxide media properties, always consult grit specifications for the full details. Two abrasives of the same color but different grades may have vastly different characteristics.

During use, aluminum oxide media will gradually darken from dust and residue. This color change is superficial and does not affect performance. Media can be cleaned and rejuvenated using special kiln equipment.

The color variety among aluminum oxide abrasives allows tailoring properties to needs. Black provides economical general purpose capability. White suits delicate finishing work. Pink and blue offer capabilities for unique situations involving heat or chemicals. With the right color and grade, aluminum oxide tackles virtually any abrasive blasting need.

Prices: How Much Does 100 & 120 Grit Al Oxide Cost?

As an industrial commodity, aluminum oxide blast media is reasonably priced, especially for frequently used mesh sizes like 100 grit and 120 grit. Prices fluctuate based on raw material costs, supply and demand. But aluminum oxide still represents good value considering its versatile blasting performance.

For reference, 100 mesh and 120 mesh black aluminum oxide typically sells for $0.50 to $1.25 per pound when purchased in bulk. Price per pound decreases with larger quantities due to bulk discounts at distributors. Smaller 1-50 pound bags are priced higher on a per-pound basis.

As a general rule, finer mesh aluminum oxide carries higher pricing. More processing and precision grading is required to achieve smaller, more consistent particle sizes in the finer grits. Conversely, coarser meshes can be produced more economically.

Higher purity, more friable aluminum oxide media also commands somewhat higher prices than standard durability media. And special additives like coloring agents increase costs further for colored variants like pink, green and blue aluminum oxide.

How aluminum oxide prices compare to other popular blasting abrasives:

• Aluminum oxide is more costly than cheaper mineral slags.
• It is moderately priced versus glass beads.
• Aluminum oxide is more economical than higher-end media like stainless steel shot.
• It is comparable in price to copper slag and nickel slag abrasives.
• Aluminum oxide is less expensive than specialty media like walnut or corn cobs.

In the range of grits from 12 mesh down to 220 mesh, end user prices typically span $0.50 to $1.75 per pound. Larger grits under #12 mesh sell for under $0.45/lb while ultra-fine sizes over 220 mesh can exceed $4.00/lb.

Packaging makes some difference in abrasive pricing. Small quantity bags involve handling costs that raise the effective price per pound. Bulk shipments in boxes, drums or bulk bags save costs and offer better per-pound value.

Geographic location plays a minor role in aluminum oxide pricing. Costs may be slightly lower when sourced near major supply hubs or coastal ports due to freight efficiencies. Some regional suppliers also factor local demand into prices.

Long term contracts or high-volume orders directly from manufacturers may realize better than advertised pricing. Buying direct skips the distributor markups. Just ensure the grit quality and consistency meet needs.

While upfront cost is always important, smart buyers ultimately consider total value over just initial price. Key factors that offset aluminum oxide media costs:

• Durability and reusability – aluminum oxide lasts far longer per pound than cheaper, weaker abrasives.
• Low waste – very little aluminum oxide fractures or breaks down in reuse.
• Consistency – precise grading avoids surprises and rework.
• High efficiency – fast work rates mean using less media.
• Recyclability – reclaimed aluminum oxide offsets virgin material purchases.

Cost per square foot abraded or per workpiece is a better metric than just price per pound. The longevity and speed of aluminum oxide drive cost-effectiveness over the long run.

Yes, aluminum oxide is priced higher than some bargain media options. But it outperforms most abrasives and provides superior total value. Investing a bit more upfront in aluminum oxide media returns bottom line savings through productivity, quality and reuse.

For shops on tight budgets, consider trying brown aluminum oxide as a lower priced option. Or look at reclaimed and recycled aluminum oxide for additional savings. Buying in larger bulk quantities can also help mitigate per-pound pricing.

Aluminum oxide abrasives represent a great balance of performance and value. Compare total costs over the lifespan of blasting media rather than just initial price. Aluminum oxide saves money in the long run thanks to durability, efficiency and recyclability. Contact suppliers to discuss how aluminum oxide fits your specific abrasive blasting budget.

Media Options: Mesh Sizes, Angularity & More

Aluminum oxide blasting media comes in a variety of options to suit different cleaning and finishing needs. Key variables include mesh size, grain shape, density, hardness and formulations. Selecting the right media parameters results in optimal performance and efficiency.

The most basic distinction is mesh size, which correlates to grit coarseness. Common meshes include 16, 24, 36, 54, 80, 120 and 220. Lower numbers represent larger, coarser media particles. Higher meshes contain finer grit ideal for polishing and smoothing.

Coarser grits like 12 to 40 mesh aggressively profile surfaces by removing layers of coating, rust or scale. Finer 100 to 220 mesh abrasives provide smooth refined finishes. Medium sizes in the 50 to 80 range offer versatility for broad use.

Angularity determines cutting action. Sharp, angular grains bite into coatings better than rounded media. Fused aluminum oxide is purposefully crushed to create jagged, multifaceted particles. Rounded beads or shot flow and rebound easier but lack bite.

For blasting applications, sharper, blockier grain shapes perform best. The fractured edges chip away at tough corrosion and paint layers. Angularity gives aluminum oxide its cutting muscle compared to smoother media.

Hardness directly affects grit durability and wear resistance during blasting. Aluminum oxide rates 9 on the Mohs scale, approaching diamond. Harder media better retains sharp edges over repeated cycles versus softer, weaker materials.

Higher purity grades of aluminum oxide containing less iron, silica and trace impurities maximize hardness. Grading labels like “A” denote the most pure, hard material. Lower “C” or “D” grades are more friable with slightly reduced hardness.

Density correlates to particle mass and kinetic energy. At 3.5 to 4 grams per cc, aluminum oxide has 50% more density than steel grit. High density equals more impact force applied to the work surface. Heavier media accelerates better through blast nozzles for added cutting power.

Shape consistency and uniformity ensure predictable results. Advanced screening, sorting and classification yield media with consistent size ranges and profiles. Erratic mixing of particle shapes and sizes causes inconsistent cutting.

Some aluminum oxide abrasives incorporate blended mesh sizes and grit types. Coarse particles combined with fine powder enhance surface profiling. Coatings apply ultrafine grit to standard media. The right formulations optimize specific finishes.

Low dust options utilize grains screened for more consistent sizes and special binders to suppress airborne dust. Other “anti-static” media resists particle agglomeration for smooth flow through hoses and nozzles.

Colors like black, brown or white indicate specific manufacturing methods that tailor properties. Trace additives also enhance features like fracture resistance, heat tolerance or chemical resistance in specialized media.

Recycled crushed and screened aluminum oxide saves costs while meeting specifications. However, contamination is a concern with media originating from uncontrolled sources.

Coated media combines standard aluminum oxide grit with custom overlays. Silicon carbide, aluminum oxide, nickel and resin coatings serve specific functions like anti-sticking or inhibiting corrosion.

With so many variations, test samples assess which aluminum oxide media optimally cleans and profiles your parts. Mesh size largely determines cut rate and final surface finish. Grain shape impacts removal efficiency and profile. Let your finish requirements guide media selection.

Balance initial cost, total usable life and processing rate when choosing media. Finer grades cost more but may better protect delicate materials. Samples confirm the best mesh, hardness and durability for your needs.

Standard fused aluminum oxide strikes a good balance between performance and cost for general purpose use. Tailor media specifications to your exact surface preparation requirements for optimal, economical results.

Applications & Uses: Metals, Wood, Plastics & More

Aluminum oxide abrasives are widely used across many industries thanks to the media’s versatility. AlOx effectively cleans, strips, etches, polishes, deburrs and profiles all types of materials from sensitive composites to hardened alloys.

For metal components, aluminum oxide quickly removes rust, mill scale, heat discoloration and old coatings like paint or powder. It profiles surfaces to desired finishes from aggressive tooth to mirrored polish. Common metal uses include:

• Cleaning fabricated metal parts
• Coating removal prior to recoating
• Weld seam blasting
• Casting knockout and shakeout
• Heat treatment descaling
• Ball burnishing
• Metal deburring
• Surface etching and pattern creation

On exotic alloys and heat sensitive materials, aluminum oxide’s durability minimizes damage, embedding and oxidation. It effectively strips coatings from reactive metals like titanium, magnesium and zinc.

For composites and plastics, appropriate mesh sizes gently profile and dull surfaces without fiber damage. Fine micron-graded AlOx also polishes composites to glossy finishes. Uses include:

• Surface prep for bonding and painting
• Cosmetic defect removal
• Fiber exposure for adhesive grip
• Smoothing and delustering
• Polishing and optical clarity

On wood, aluminum oxide cleans, etches and textures both raw lumber and finished pieces. It removes mill glaze for improved adhesion and provides tooth for finishes. Wood uses include:

• Preparing timber prior to staining
• Removing old paint and coatings
• Distressing and antiquing
• Creating etched designs
• Sanding between finish coats

For glass and ceramic materials, aluminum oxide gently frost, etch, polish, clean and decorate surfaces. On glass, micro-graded AO gives optical clarity. Applications include:

• Frosted glass etching
• Ceramic cleaning and finishing
• Glass decorating – smooth satin to sandblasted looks
• Industrial glass polishing and optical clarity
• Etching and engraving

Paint stripping to bare substrate is readily achieved with aluminum oxide across many material types. It replaces caustic chemical strippers for environmentally safe removal.

As a higher purity mineral abrasive, aluminum oxide is compatible with sensitive applications like aerospace, medical, food and pharmaceutical production. It cleans thoroughly without contamination.

Aluminum oxide grit serves equally well in blast cabinets and industrial blast rooms. Both automated and manual blasting benefit from its versatility and efficiency.

Finer aluminum oxide mesh sizes down to 1000 grit are used to polish an endless array of materials from plastics and composites to metals, glass and stone. It produces consistent mirror surface finishes.

With the right mesh selection, aluminum oxide wet blasts, vapor blasts, pressure blasts and gravity feeds. It excels in all common blasting systems and machines from small cabinets to large automated setups.

Repeated aluminum oxide recycling gradually rounds the grains until no longer sharp. At this point, the grit serves as burnishing media for mass finishing applications.

Aluminum oxide’s combination of hardness, sharpness, purity and controlled grain sizes make it an adaptable abrasive for virtually any blasting or surface finishing need. It’s hard to find a material that can’t be efficiently processed with aluminum oxide media.

Safety Tips When Handling and Using Al Oxide Grit

Aluminum oxide abrasives, like any industrial material, require proper safety precautions during handling and use. Following basic guidelines prevents injuries and keeps workers healthy.

Avoid breathing aluminum oxide dust by wearing an OSHA-approved respirator whenever handling or loading abrasive media. Use filter cartridges rated for particulate and dust. Even inert dusts can irritate lungs if inhaled.

Wear eye protection like safety glasses or goggles when working with aluminum oxide grit. The particles and dust can irritate unprotected eyes. A face shield provides even better protection.

Wear appropriate gloves to protect hands from both abrasion cuts and residue. Select glove material resistant to rips, tears and abrasion damage from sharp media.

Use hearing protection like ear muffs or plugs when blasting. Prolonged noise from air nozzles and impact can damage hearing over time.

For blasting, wear a long-sleeved shirt and pants without cuffs. Tuck pants into boots or tape ends to prevent media entry. Sturdy leather boots also protect feet.

Prevent slips by cleaning up spilled media promptly. Aluminum oxide grit underfoot is a slipping hazard. Sweep or vacuum regularly to keep floors clear.

Use proper lifting techniques when handling heavy bags or pails of media. Bend knees, keep back straight and lift with legs. Get help moving large bulk containers.

Secure drums, boxes and bags during transport so contents don’t shift. Tightly close bags and use equipment rated for the weight. Don’t overload lift trucks.

Store aluminum oxide in a cool, dry place away from moisture. Wet media can harden into concrete-like lumps that clog equipment. Keep storage areas tidy.

Check material safety data sheets (MSDS) for additional safety information on aluminum oxide media. Follow recommended precautions for your specific product.

Protect nearby workers and equipment from stray media when blasting. Use screens, barriers and proper ventilation to contain dust.

For cabinet blasting, check door seals and latch function regularly. Keep stresses on windows and gloves to a minimum.

Follow manufacturer instructions for safe equipment operation. Ensure pressure capabilities match rated nozzle pressures. Maintain tipping valves properly.

Inspect hoses regularly for wear, paying particular attention to couplings and bends. Replace defective parts before failure occurs.

Shutdown equipment and depressurize lines completely before performing maintenance. Verify valves are closed and regulators empty before working.

Never point nozzles at yourself, others or toward fragile equipment when blasting. Keep bystanders clear during operation.

Adjust regulator pressure and abrasive flow only within equipment limits. Excessive pressure risks hose rupture.

Take care when removing stuck workpieces or cleaning the cabinet interior. Avoid contact with clutter and sharp objects.

Turn lighting on bright when blasting to see work area clearly. Monitor media levels and refill promptly when low. Never run equipment dry.

Always wear blasting gloves. Inspect them for holes, rips or signs of damage after each use. Replace worn gloves immediately.

Keep flammable liquids like solvents far away from blasting operations and aluminum oxide storage. Never smoke around media.

Prohibit eating or drinking in media handling areas. Always wash hands thoroughly after working with aluminum oxide.

Follow proper media disposal methods. Contain and label spent grit. Consider recycling programs to minimize waste.

By taking basic safety steps when handling and blasting with aluminum oxide, injuries and hazards are easily avoided. Protect yourself and watch out for others. Stop immediately if an unsafe condition arises.

FAQs & Key Takeaways on Coarse Aluminum Oxide

When it comes to machining metals and other hard materials, having the right abrasive is crucial for efficiency and quality results. Coarse grit sizes like 100 and 120 aluminum oxide media are excellent options for high-performance material removal and surface preparation. But with so many types and grades available, how do you know which coarse aluminum oxide is best for your application? Here we’ll cover everything you need to know about shopping for and using 100, 120, and other coarse aluminum oxide abrasives.

Aluminum oxide, also known as corundum, is one of the hardest abrasive materials available. It’s highly durable and fractures to continually expose fresh cutting edges during use. This makes aluminum oxide media ideal for machining, grinding, sanding, honing, and surface prep work on metals, concrete, masonry, and other hard materials. The most common grit sizes used are between 16 and 120 – the lower the number, the coarser and more aggressive the abrasive.

Coarse 100 and 120 grit aluminum oxides are extremely useful for rapid stock removal, heavy grinding, welding spatter removal, paint and rust stripping, etc. The sharp grains cut quickly and deeply, making them the top choice for fast material removal where finish is less important. 120 grit abrasives will remove stock nearly twice as fast as 150 grit, while still leaving a moderately smooth surface. For even heavier cutting action, 100 grit aluminum oxide is unmatched.

When shopping for 100 or 120 aluminum oxide blast media, you’ll encounter several grade options. Light etch, fast cut, fast etch, and more. These refer to quality grades from low/consistent quality to high/consistent. Most varieties will work well for general coarse grinding and surface prep. For best performance in specialty metalworking applications, opt for a high quality grade aluminum oxide.

Coarse aluminum oxide blast media is modeled for air blasting operations as opposed to finer 200 grit and up blasting media. The heavy 100 or 120 grit particles excel at aggressive surface profiling, coating/rust removal, and heavy stock removal. A blasting cabinet containing coarse recycled aluminum oxide provides fast cutting action across many maintenance and fabrication jobs.

When working with coarse aluminum oxide abrasives, keep a few best practices in mind:

• Use the proper safety equipment – eye protection, respirator mask, heavy gloves, etc.
• Don’t overwork the media – inspect and replace worn abrasive regularly.
• Adjust blasting pressure/force to suit the task.
• Allow cooling if metal surfaces get too hot.
• Clean surfaces thoroughly of abrasive dust/fragments after blasting or machining.

While coarse aluminum oxide cuts aggressively, it does leave behind deeper scratches and rougher textures than finer abrasives. Limit its use to tasks where finish quality is less important. And be sure to account for the higher media consumption rate – you’ll go through coarse grits much faster than fine ones.

Where to Buy Coarse Aluminum Oxide Near Me

Whether you need coarse blasting media for a large industrial operation or a small home shop project, getting the right aluminum oxide abrasive locally comes down to finding a well-supplied distributor, warehouse, or grit dealer in your area. Here are some tips for locating coarse 100 or 120 grit aluminum oxide media near you:

• Search for “abrasives near me” or “blasting media near me” – contact distributors that carry aluminum oxide products.
• Visit a large hardware store or home improvement center – look in sanding and metalworking sections.
• Check industrial supply stores – many carry common coarse grit aluminum oxide.
• Search for local “grit companies” or abrasive suppliers that sell direct.
• Buy online and do in-store pickup at a big box retailer to skip shipping costs.

When sourcing coarse aluminum oxide media, buy from an established, reputable supplier. Ask questions to determine if they carry fresh stock and multiple grades. Buying old, inferior aluminum oxide can lead to frustration and wasted time on projects. A bit of upfront research helps ensure you get quality coarse grit for maximum performance.

Conclusion

With its rapid cutting action, 100 and 120 grit aluminum oxide is the go-to abrasive for heavy grinding, rust/coating removal, welding prep, and similar coarse tasks. While it lacks finesse, its unmatched aggressiveness makes easy work of high-intensity jobs where finish is not critical. Just be sure to take necessary safety precautions. Finding a local trusted source for high quality, affordable coarse aluminum oxide blast media or sandpaper takes a bit of searching, but guarantees you always have the right supplies on hand.